![]() ![]() The foliage color and growth rate improve with regular application every 7-14 days. This formula by Miracle-Gro helps your Caladium by creating an optimum growing environment. Miracle-Gro claims that this fertilizer will feed, ironize and acidify. Caladiums also prefer slightly acidic growing conditions. This product is dedicated to the acid-loving varieties of houseplants. You might have heard that if the soil suits your Azalea plants, it will suit the Caladiums. Conclusion About The Best Fertilizers for CaladiumsĪzalea, Camellia, and Rhododendron Plant Food by Miracle-Gro – Best Overall Caladium Fertilizer.Best Fertilizers for Caladiums – Organic Fertilizers.Best Fertilizers for Caladiums Buying Guide.Azalea Food by Nutri Star – Best Slow Release Caladium Fertilizer.Bone Meal Fertilizer by Down to Earth – Best Bone Meal for Caladiums.Shake n’ Feed by Miracle-Gro – Best Caladium Fertilizer for Weed Protection.Soil Acidifier by Espoma – Best Acidifier for Caladiums.All-Purpose 20-20-20 by Jack’s Classic – Best Water-Soluble Fertilizer.Earth – Best Bulb Fertilizer for Caladiums Outdoor and Indoor Plant Food by Osmocote Plus – Best Control Release Caladium Fertilizer.Annuals and Perennials Fertilizer by Jobe’s Organics – Best Granular Caladium Fertilizer.Indoor Plant Food by Miracle-Gro – Best for Budget Caladium Fertilizer.Azalea, Camellia, and Rhododendron Plant Food by Miracle-Gro – Best Overall Caladium Fertilizer.Common Namesīigleaf bydrangea, French hydrangea (2 types: mophead + lacecap) Incorporate dry fertilizer into top 2” – 3” of soil and water thoroughly. Use a fertilizer low in phosphorous (the middle number in the content analysis) such as 12‐4‐8 to encourage production of blue flowers.įor other types of hydrangeas, use a general purpose fertilizer, at recommended rates on the package. Phosphorus in the soil tends to bind aluminum so that it isn’t readily available for the plant. When and how should hydrangeas be fertilized?įor blue cultivars of bigleaf and mountain hydrangea, fertilize once in spring with a formulation for acid‐loving plants. Caution: too much aluminum sulfate will injure plants. Mulch with peat or pine bark.Įxact amounts of lime or aluminum sulfate needed to get the flower color you want will vary depending on current soil pH and soil type. To lower pH apply an acidic fertilizer such as aluminum sulfate, or wettable sulphur. Too much lime can cause new growth to yellow due to lack of iron. ![]() To raise pH, add limestone according to directions on the bag. Between pH 5.5 and pH 6.5, the flowers will be purple, or a mixture of blue and pink on the same plant. Most soils have enough aluminum, but the aluminum is not available to the plant if the soil pH is high.įor most bigleaf hydrangeas, blue flowers will be produced in acidic soil (pH 6.5) will usually produce pink flowers. ![]() Some cultivars of these are better suited for blue flowers while others are best grown as pink.Īluminum in the tissue of hydrangea flowers causes the blue coloration. Only bigleaf (Hydrangea macrophylla ) or mountain hydrangea (Hydrangea serrata) flowers will turn blue. To see if you can encourage your hydrangea to produce blue or pink flowers, determine what kind of hydrangea you have! Most types of hydrangeas grown in Massachusetts are listed in the table below. ![]()
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